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Bacteria; Eubacterai Archae/ Viruses

About microscopic forms of life, including Bacteria, Archea, protozoans, algae and fungi. Topics relating to viruses, viroids and prions also belong here.

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Bacteria; Eubacterai Archae/ Viruses

Postby agurus » Fri Apr 15, 2005 2:07 am

Hi I’ve got a couple of tough questions I can NEVER answer, you can just reply in a short answer response/list :D:

1.) Why are euglenas well adapted to conditions of varying light intensities?
2.) What are 3 (simple) ways to classify bacteria?
3.) 3 roles do Eubacteria play in environment?
4.) What would bacteria that live in extreme environments such as hot springs be a good source of?
5.) Which kingdom is thought to have given rise to eukaryotes and why?
6.) How do envelope proteins help mammalian viruses gain eatery into cells?

+++++++++++++++++++++++++++++++++++

Those are the ones I need alota help on but these below are some other questions I have and answers and I was wondering if they would be correct:

7.) Explain importance of Wash Step and why the color of dye is important in gram staining.
ANSWER:

The importance of the wash step in Gram stain is, that to remove the dye from the walls of bacteria so coloring is not mixed with final results, as well the dye for gram positive stays one while from gram negative lightens. The order of dyes are important because, Gram Positive bacteria have thick peptidoglycon walls that retain the dark color, so violet is first used, then after the wash for gram negative the color washes off a bit, and then a lighter color is added so the Gram Positive will show purple and negative will show light red/pink.



8.) Why is boiling water after floods good practice? And will it keep you 100% safe?
ANSWER:

This is a good practice because the boiling of water will kill many harmful bacteria in the water that might have entered during the flooding, though this will not keep you 100% safe because, some bacteria still live and don’t die (live in harsh conditions).


Thats all for now i suppose PLEASE PLEASE help me thnx! :idea:
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Postby biostudent84 » Fri Apr 15, 2005 2:13 am

1.) Why are euglenas well adapted to conditions of varying light intensities?

They have chlorophyll as well as the ability to "eat" other organisms.

2.) What are 3 (simple) ways to classify bacteria?

Mono, di, and poly

3.) 3 roles do Eubacteria play in environment?

Decomposition of dead matter, release of usable nitrogen, (can't remember the third right now)

4.) What would bacteria that live in extreme environments such as hot springs be a good source of?

Phosphorous

5.) Which kingdom is thought to have given rise to eukaryotes and why?

Monerans. Also called Prokaryotes. They are simpler cells, and thought to be "older."

6.) How do envelope proteins help mammalian viruses gain eatery into cells?

(I'd like to know this one myself :-D )
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Postby mith » Fri Apr 15, 2005 2:38 am

3. Maybe fixing nitrogen?
4. I don't know about phosphorus but I know definitely Sulphur in the form of hydrogen sulfide from the vents.
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Accepting hardships as the pathway to peace;
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Postby agurus » Fri Apr 15, 2005 12:00 pm

sweet thanks, dont know 6 eitehr lol! Say are 7-8 Right?

Also another question:

9.) What causes scarpie?
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Postby biostudent84 » Fri Apr 15, 2005 2:33 pm

This is all I found:

"Novel proteinaceous infectious particles"
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Postby canalon » Fri Apr 15, 2005 3:36 pm

agurus wrote:sweet thanks, dont know 6 eitehr lol! Say are 7-8 Right?

Also another question:

9.) What causes scarpie?


Scrapie is caused by prions. It is a protein that as an incorrect folding and catalyses the other similar protein produced by the healthy cells to fold the same way, hence preventing them from performing their normal tasks.

HTH

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